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四种无机盐对南方根结线虫卵囊、卵孵化及其幼虫存活的影响

, PP. 449-455

Keywords: 南方根结线虫,无机盐,孵化,存活

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Abstract:

为了明确NH4HCO3、CuSO4?5H2O、CsCl、NH4NO34种无机盐对南方根结线虫卵囊、卵孵化及其幼虫存活的影响。在室内条件下,采用浸渍法测试了4种无机盐在不同浓度和时间处理的作用效果。结果显示:各种无机盐均对线虫卵、卵囊孵化有抑制作用,对2龄幼虫有致死作用。随着无机盐浓度的增加和处理时间的延长,线虫卵、卵囊孵化的抑制率和2龄幼虫的死亡率显著提高。其中0.05mol/LNH4HCO3对线虫卵囊孵化的抑制效果最好,处理16h达81.17%,24h后达100%;对线虫卵孵化也有很强的抑制作用,处理16h达93.33%,24h后达100%。各种无机盐在不同浓度和处理时间内均对2龄幼虫有致死效果,且半致死中浓度LC50不同,其中CuSO4?5H2O的LC50最小,NH4HCO3和CsCl次之。表明CuSO4?5H2O对南方根结线虫2龄幼虫有较强的致死活性,南方根结线虫2龄幼虫对CsCl的敏感性较高。

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